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问题
单项选择题
电子邮件窗口的文件夹中有收件箱等选择,但不提供的选择是( )
A.发件箱
B.已发送邮件
C.已转发邮件
D.已删除邮件
答案
参考答案:C
选择题
Yesterday he told me that he had met his uncle _____.
A. two years ago
B. two years before
C. before two years
D. for two years
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选择题
设
α∈(0,
π
2
)
,若
sinα=
3
5
,则
2
cos(α+
π
4
)
=( )
A.
1
5
B.
7
5
C.
-
7
5
D.
-
1
5
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